目錄
序
第1章 巖石動態(tài)試驗裝置與試驗技術(shù) 1
1.1 巖石準(zhǔn)動態(tài)試驗裝置 2
1.1.1 快速加載試驗機原理 2
1.1.2 國內(nèi)外研制的幾種快速加載試驗機 4
1.1.3 中應(yīng)變率段（10s-1）的巖石試驗方法 9
1.2 巖石動態(tài)壓縮試驗裝置與試驗技術(shù) 18
1.2.1 霍普金森實驗的沿革與發(fā)展 18
1.2.2 霍普金森壓桿裝置試驗原理 19
1.2.3 巖樣應(yīng)力均勻化的簡化分析 24
1.2.4 電腦化數(shù)據(jù)采集處理系統(tǒng)原理與方法 28
1.3 自行研制的巖石沖擊加載試驗系統(tǒng) 31
1.3.1 壓氣驅(qū)動的水平?jīng)_擊試驗機 31
1.3.2 氯氣驅(qū)動的大直徑?jīng)_擊試驗機 33
1.3.3 動態(tài)試驗測試系統(tǒng) 35
1.3.4 信號與數(shù)據(jù)處理軟件 37
1.4 霍普金森壓桿的變形裝置 39
1.4.1 三軸霍普金森壓桿 39
1.4.2 霍普金森拉桿 43
1.4.3 霍普金森扭桿 45
1.4.4 其他變形裝置 47
1.5 巖石類材料動態(tài)拉伸試驗方法 49
1.5.1 動態(tài)直接拉伸試驗 49
1.5.2 動態(tài)間接拉伸試驗 50
1.5.3 動態(tài)層裂試驗 53
1.6 巖石超動態(tài)試驗裝置簡述 56
1.6.1 幾種不同類型的試驗裝置 56
1.6.2 氣體炮的工作原理 57
1.6.3 平板撞擊試驗試件布置 60
參考文獻(xiàn) 62
第2章 巖石沖擊試驗合理加載波形與試驗方法 67
2.1 沖頭撞擊桿件產(chǎn)生的應(yīng)力波形 67
2.1.1 簡單結(jié)構(gòu)沖頭產(chǎn)生的應(yīng)力波形 67
2.1.2 復(fù)雜沖頭撞擊桿件的電算方法 72
2.2 矩形波波形彌散與巖石動態(tài)應(yīng)力應(yīng)變曲線 80
2.2.1 不同形狀應(yīng)力披在桿中傳播的彌散效應(yīng) 80
2.2.2 矩形被加載的應(yīng)力-應(yīng)變曲線 86
2.2.3 不同加載波形下應(yīng)力-應(yīng)變-應(yīng)變率關(guān)系 89
2.3 巖石類材料動態(tài)試驗的合理加載形式 91
2.3.1 錐形沖頭加載 91
2.3.2 紡錘形沖頭加載 94
2.3.3 試樣的恒應(yīng)變率變形條件與試驗驗證 96
2.4 巖石恒應(yīng)變率動態(tài)本構(gòu)關(guān)系獲得的新方法 99
2.4.1 SHPB試驗數(shù)據(jù)的三維散點處理方法 99
2.4.2 試驗數(shù)據(jù)的三維散點結(jié)果的解釋 103
2.5 巖石動態(tài)測試的建議方法 104
2.5.1 試驗系統(tǒng)與參數(shù) 105
2.5.2 巖石動態(tài)抗壓強度測試 105
2.5.3 動態(tài)巴西試驗測試巖石抗拉強度 107
2.5.4 1 型動態(tài)斷裂韌度測試 108
參考文獻(xiàn) 110
第3章 合理加載波形反演設(shè)計與試驗系統(tǒng)數(shù)值模擬 113
3.1 已知波形的沖頭形狀反演理論 113
3.1.1 等截面圓柱沖頭撞擊彈性長桿產(chǎn)生的應(yīng)力波 113
3.1.2 階梯狀變截面沖頭撞擊彈性長桿時所產(chǎn)生的應(yīng)力波 115
3.1.3 連續(xù)變截面沖頭撞擊時所產(chǎn)生的應(yīng)力波 116
3.1.4 基于一維應(yīng)力被理論的沖頭形狀反演設(shè)計 118
3.2 半正弦波對應(yīng)的沖頭結(jié)構(gòu)反演 119
3.2.1 不同桿件尺寸的半正弦波沖頭反演設(shè)計 120
3.2.2 半正弦波加載下的巖石動態(tài)試驗 122
3.3 紡錘形沖頭SHPB 系統(tǒng)的應(yīng)力波特性 123
3.3.1 不同接觸情況下桿中應(yīng)力不均勻性分析 123
3.3.2 紡錘形沖頭偏心撞擊下SHPB 桿的動態(tài)響應(yīng) 127
3.4 紡錘形沖頭巖石SHPB 試驗的校驗 131
3.4.1 紡錘形沖頭沖擊速率和人射應(yīng)力的關(guān)系 131
3.4.2 紡錘形沖頭SHPB 系統(tǒng)校正步驟 133
3.5 半正弦波加載SHPB 系統(tǒng)數(shù)值模擬 134
3.5.1 紡錘形沖頭SHPB 數(shù)值模擬系統(tǒng) 135
3.5.2 顆粒流SHPB 動態(tài)數(shù)值模擬 139
3.5.3 應(yīng)變率效應(yīng)的影響 147
參考文獻(xiàn) 152
第4章 動靜組合加載與溫壓耦合試驗技術(shù) 155
4.1 巖石動靜組合加載試驗技術(shù) 155
4.1.1 靜載與微擾組合加載試驗技術(shù) 156
4.1.2 基于SHPB 的動靜組合加載試驗系統(tǒng) 158
4.2 溫壓耦合巖石動載試驗裝置與技術(shù) 162
4.2.1 溫壓耦合作用下巖石動態(tài)試驗裝置 163
4.2.2 試驗方法與操作過程 164
4.3 動靜載荷耦合破碎巖石試驗系統(tǒng) 165
4.3.1 功、靜載荷耦合破碎巖石試驗原理 165
4.3.2 動、靜載荷耦合破碎巖石試驗裝置 166
4.3.3 試驗裝置可行性驗證 169
4.4 巖石真三軸電液伺服誘變擾動試驗系統(tǒng) 170
4.4.1 試驗系統(tǒng)概述 170
4.4.2 試驗技術(shù)參數(shù) 174
參考文獻(xiàn) 175
第5章 沖擊載荷作用下的巖石力學(xué)特性 176
5.1 巖石的動態(tài)強度 176
5.1.1 巖石的應(yīng)力應(yīng)變關(guān)系 177
5.1.2 巖石動態(tài)強度與應(yīng)變率的關(guān)系 177
5.1.3 加載波形和延續(xù)時間的影響 185
5.1.4 巖石動態(tài)強度的尺寸效應(yīng) 186
5.2 巖石動態(tài)斷裂破壞準(zhǔn)則 192
5.2.1 Grady-Kipp 模型 192
5.2.2 Steverding-Lehnigk 動態(tài)斷裂準(zhǔn)則 197
5.3 巖石的動態(tài)損傷累積 200
5.3.1 應(yīng)力被作用下的巖石疲勞損傷 201
5.3.2 循環(huán)沖擊下巖石的損傷規(guī)律 203
5.3.3 應(yīng)力波在巖體中的衰減 205
5.4 高溫下的巖石動力學(xué)特性 208
5.4.1 高祖前后巖石密度及波速特性 208
5.4.2 高溫后巖石動態(tài)拉壓力學(xué)特性 209
5.4.3 高溫后巖石動態(tài)斷裂力學(xué)特性 215
參考文獻(xiàn) 217
第6章 動靜組合加載下的巖石破壞特征 221
6.1 靜載與低頻擾動作用下的巖石力學(xué)特征 221
6.1.1 一維動靜組合加載 221
6.1.2 二維動靜組合加載 224
6.1.3 動靜組合加載中動載荷頻率與強度的影響 227
6.2 靜壓與強動載組合作用下的巖石力學(xué)特性 231
6.2.1 相同動載不同靜載下巖石的力學(xué)特性 231
6.2.2 相同靜載不同動載下巖石的力學(xué)特性 234
6.2.3 圍壓對組合加載巖石力學(xué)特性的影響 235
6.3 動靜組合加載下的巖石本構(gòu)模型 239
6.3.1 基本假設(shè) 239
6.3.2 一維動靜組合加載下巖石的本構(gòu)模型 240
6.3.3 三維動靜組合加載下巖石的本構(gòu)模型 241
6.3.4 巖石動靜組合加載本構(gòu)關(guān)系的試驗驗證 245
6.4 溫壓耦合作用下的巖石動態(tài)力學(xué)特性 250
6.4.1 不同靜壓下巖石動態(tài)力學(xué)性質(zhì)隨溫度變化規(guī)律 250
6.4.2 不同溫度巖石動態(tài)力學(xué)性質(zhì)隨靜壓變化規(guī)律 253
6.4.3 溫壓耦合作用下巖石動態(tài)本構(gòu)模型與數(shù)值驗證 255
參考文獻(xiàn) 257
第7章 巖石在應(yīng)力波作用下的能量耗散 258
7.1 巖石沖擊破碎時的能量分布 258
7.2 巖石在不同加載波下的能量耗散 260
7.2.1 矩形波加載 261
7.2.2 指數(shù)衰減被加載 264
7.2.3 鐘形波加載 265
7.2.4 以彈性波形式無用耗散的能量值 267
7.2.5 延續(xù)時間和被形的影響 268
7.3 應(yīng)力波作用下巖石的吸能效果 269
7.3.1 巖石吸能分析 269
7.3.2 人射能、反射能、透射能與巖石吸能 271
7.3.3 不同延續(xù)時同下的巖石吸能試驗結(jié)果 274
7.4 不同加載波形下巖石破碎的耗能規(guī)律 276
7.4.1 巖石耗能與入射能的關(guān)系 276
7.4.2 不同加載條件下的破碎程度 278
7.4.3 實現(xiàn)合理破巖的應(yīng)力波體系 280
7.5 動靜組合載荷下巖石破壞的耗能規(guī)律 282
7.5.1 動靜組合載府下巖石能量計算與釋能規(guī)律 282
7.5.2 三維組合加卸載下的巖石能量吸收規(guī)律 285
7.5.3 圍壓卸載對巖石吸收能量的影響 286
參考文獻(xiàn) 287
第8章 動靜載荷耦合作用下巖石破碎特征 290
8.1 動靜載荷耦合作用下破巖理論分析 290
8.1.1 動靜載荷耦合破巖特性曲線分析 290
8.1.2 動、靜載荷耦合作用的力學(xué)分析 292
8.1.3 動、靜載荷破巖的損傷斷裂分析 293
8.2 動靜載荷耦合作用下巖石破碎數(shù)值分析 299
8.2.1 靜載荷作用下巖石破碎的數(shù)值分析 300
8.2.2 沖擊載荷作用下巖石破碎的數(shù)值分析 301
8.2.3 動靜組合載荷作用下巖石破碎的數(shù)值分析 301
8.3 動靜載荷耦合作用下的破巖試驗 303
8.3.1 靜壓與沖擊耦合下的試驗 304
8.3.2 靜壓與沖擊耦合下的切削試驗 307
8.3.3 水射流與靜壓沖擊聯(lián)合作用破巖試驗 311
參考文獻(xiàn) 313
第9章 應(yīng)力波在不同邊界結(jié)構(gòu)面的傳播 315
9.1 一維縱波在桿性質(zhì)突變處的反射與透射 315
9.2 完全黏結(jié)條件下縱橫波的折反射關(guān)系 317
9.2.1 波在自由邊界上的反射 317
9.2.2 波在兩種介質(zhì)分界面上的反射和折射 322
9.3 可滑移條件下的折反射關(guān)系與巖體動力滑移準(zhǔn)則 325
9.3.1 可滑移條件下的折反射關(guān)系 325
9.3.2 結(jié)構(gòu)面上的能流分布與巖體動力滑移準(zhǔn)則 331
9.3.3 爆破近區(qū)結(jié)構(gòu)面的整體界面效應(yīng) 334
9.4 應(yīng)力波在閉合節(jié)理處的傳播 336
9.4.1 縱波在線性法向變形節(jié)理處的傳播 336
9.4.2 垂直縱波在非線性法向變形節(jié)理處的傳播 341
9.4.3 初始剛度和頻率對透反射系數(shù)的影響 342
9.5 應(yīng)力波在張開節(jié)理處的傳播 346
9.5.1 應(yīng)力披在張開節(jié)理處傳播的解析模型 346
9.5.2 不同應(yīng)力波在張開節(jié)理處的能量傳遞規(guī)律 351
9.6 應(yīng)力波在層狀巖體中的傳播 357
9.6.1 等效波阻法 357
9.6.2 應(yīng)力波通過夾層后的透射應(yīng)力波形 360
9.6.3 應(yīng)力波遇夾層后的能量傳遞效果 365
9.7 爆轟波作用和巖石與炸藥的合理耦合準(zhǔn)則 366
9.7.1 傳統(tǒng)的匹配觀點 367
9.7.2 藥卷爆轟與巖體的相互作用模型 368
9.7.3 巖石與炸藥的合理耦合準(zhǔn)則~ 370
9.7.4 常規(guī)炸藥與不同巖體的合理匹配 373
參考文獻(xiàn) 376
第10章 應(yīng)力波在含空區(qū)巖體中的傳播 378
10.1 爆炸在巖體中產(chǎn)生的應(yīng)變波 378
10.1.1 線性炸藥爆炸的波形合成 378
10.1.2 測點位置與方向?qū)Σㄐ蔚挠绊?381
10.1.3 爆炸成坑的半徑范圍 388
10.2 質(zhì)點震動速率經(jīng)驗公式與評估標(biāo)準(zhǔn) 389
10.2.1 不同巖石條件下的評估標(biāo)準(zhǔn) 389
10.2.2 質(zhì)點震動峰值速率經(jīng)驗公式 391
10.2.3 含有采空區(qū)的露天臺階爆破實例 393
10.3 應(yīng)力波在含空區(qū)巖體中傳播的數(shù)值模擬 398
10.3.1 幾何模型的建立 398
10.3.2 爆破荷載輸入方法 400
10.3.3 數(shù)值計算模型的建立 402
10.3.4 數(shù)值計算模型驗證 404
10.4 采空區(qū)動力穩(wěn)定性分析 405
10.4.1 巖體表面應(yīng)力波傳播 405
10.4.2 臺階爆破下的采空區(qū)穩(wěn)定性分析 407
10.4.3 最小安全距離 410
參考文獻(xiàn) 412
第11章 應(yīng)力波在含石英類壓電巖體中的傳播 414
11.1 應(yīng)力波與電磁波耦合的基本模型 414
11.1.1 力電耦合波動方程 414
11.1.2 應(yīng)力波與電磁波的耦合理論 415
11.2 節(jié)理對巖體電磁輻射的影響 421
11.2.1 線性節(jié)理對電磁輻射的影響 421
11.2.2 非線性節(jié)理對電磁輻射的影響 423
11.2.3 節(jié)理對電磁輻射影響的計算與討論 424
11.3 巖石電磁輻射與巖石屬性參數(shù)的關(guān)系 428
11.3.1 巖石破裂裂紋寬度 428
11.3.2 電磁輻射頻率與巖石參數(shù)的關(guān)系 430
11.3.3 電磁輻射幅值與巖石參數(shù)的關(guān)系 431
11.4 應(yīng)力波傳輸效應(yīng) 434
11.4.1 耦合電磁波的頻率和強度 434
11.4.2 耦合電磁波的表面效應(yīng) 435
11.4.3 臨強地震與巖石破裂時電磁異�，F(xiàn)象的綜合 435
參考文獻(xiàn) 437
第12章 菌應(yīng)力巖體的擾動破裂特征與有效利用 440
12.1 高應(yīng)力硬巖的板裂破壞 440
12.1.1 高應(yīng)力硬巖板裂破壞的表現(xiàn)形式 440
12.1.2 硬巖單軸壓縮試驗下的板裂破壞 442
12.1.3 硬巖真三軸卸載試驗下的板裂破壞 450
12.2 沖擊載荷作用下的巖體層裂破壞 456
12.2.1 巖體層裂破壞的表現(xiàn)形式和發(fā)生條件 456
12.2.2 一維沖擊下的硬巖層裂破壞 458
12.2.3 層裂破壞過程的損傷演化關(guān)系 460
12.3 動力擾動下高應(yīng)力礦柱的破壞特征 462
12.3.1 深部礦柱動力擾動的力學(xué)模型 462
12.3.2 深部礦柱動力擾動的三維數(shù)值分析 465
12.3.3 深部礦柱應(yīng)變能隨擾動峰值的變化特征 469
12.4 高應(yīng)力巖體分區(qū)破裂特征與動力學(xué)解釋 470
12.4.1 高應(yīng)力巖體分區(qū)破裂的研究現(xiàn)狀 471
12.4.2 高應(yīng)力巖體強卸荷的非連續(xù)破壞特征 475
12.4.3 高應(yīng)力巖體加載的非連續(xù)破壞特征 482
12.5 高應(yīng)力巖體誘導(dǎo)致裂與非爆連續(xù)開采 487
12.5.1 非爆連續(xù)開采理念與應(yīng)用進(jìn)展 487
12.5.2 巖體卸荷誘導(dǎo)致裂理論與應(yīng)用 488
12.5.3 誘導(dǎo)致裂非爆連續(xù)開采可行性初探 491
參考文獻(xiàn) 496
第13章 深部硬巖巖爆的動力學(xué)解釋與工程防護(hù) 499
13.1 巖爆產(chǎn)生條件與發(fā)生判據(jù) 499
13.1.1 國內(nèi)外巖爆研究述評 499
13.1.2 巖爆誘因的靜力學(xué)條件與判據(jù) 501
13.1.3 硬巖深部開采動力擾動與誘發(fā)巖爆 505
13.2 彈性儲能釋放的巖爆發(fā)生判據(jù) 508
13.2.1 一維動靜組合加載試驗的巖石能量分析 508
13.2.2 基于擾動載荷下動靜能量指標(biāo)的巖爆發(fā)生判據(jù) 513
13.2.3 高應(yīng)力巖體動力擾動下巖爆發(fā)生的試驗室重現(xiàn) 514
13.3 有巖爆傾向性高應(yīng)力巖體的支護(hù) 518
13.3.1 基于動力學(xué)的巖體支護(hù)系統(tǒng) 518
13.3.2 基于自穩(wěn)時變結(jié)構(gòu)的巖爆動力源分析 521
13.3.3 動靜組合支護(hù)關(guān)鍵技術(shù) 527
13.3.4 巷道動靜組合支護(hù)實例 531
參考文獻(xiàn) 533
第14章 礦山巖體工程微震監(jiān)測 536
14.1 微震監(jiān)測原理 536
14.1.1 震源定位 536
14.1.2 主要微震參數(shù) 537
14.1.3 微震源機制 540
14.2 監(jiān)測網(wǎng)的確定及優(yōu)化 542
14.2.1 重點監(jiān)測區(qū)域確定 542
14.2.2 礦區(qū)應(yīng)力三維數(shù)值分析 543
14.2.3 監(jiān)測點位置分布及優(yōu)化方案 546
14.3 無需預(yù)先測速的微震震源定位理論 556
14.3.1 傳統(tǒng)定位方法數(shù)學(xué)擬合形式 556
14.3.2 無需預(yù)先測速率的微震定位的數(shù)學(xué)形式 558
14.3.3 誤差分析及算例 560
14.3.4 現(xiàn)場微震震源定位的爆破試驗及分析 565
14.4 大規(guī)模開采礦山區(qū)域性危險地震預(yù)測 567
14.4.1 地震視應(yīng)力和位移特性 567
14.4.2 區(qū)域性地震成核預(yù)測模型 570
14.4.3 應(yīng)力狀態(tài)和變形參數(shù)時間序列 572
參考文獻(xiàn) 574
第15章 應(yīng)力波理論在巖土工程中的應(yīng)用 578
15.1 沖擊破巖 578
15.1.1 沖擊破巖機械的受力和效率分析 579
15.1.2 人射應(yīng)力波形對能量傳遞效率的影響 591
15.1.3 沖擊鑿入系統(tǒng)的電算模擬 593
15.1.4 沖擊鑿巖機具設(shè)計中的幾個問題 596
15.2 樁基工程 598
15.2.1 應(yīng)力波在樁基中的發(fā)展過程 598
15.2.2 波動理論在樁基工程中的應(yīng)用 600
15.2.3 動測法存在的問題 609
15.3 強夯 610
15.3.1 強夯引起的波動與加固原理 611
15.3.2 錘重、落距與加固深度的關(guān)系 614
15.3.3 散體巖料的動壓固效果 616
15.4 巖土工程中的無損檢測 622
15.4.1 混凝土無損檢測 622
15.4.2 錨桿無損檢測 626
15.5 防護(hù)工程 629
15.5.1 爆炸波對地下坑道的破壞機理 629
15.5.2 坑道安全防護(hù)層厚度計算方法 631
15.5.3 地下硐室抗爆設(shè)計 633
參考文獻(xiàn) 638
索引 640
彩圖
CONTENTS
Preface
CHAPTER 1 ROCK DYNAMIC TEST APPARATUS AND TEST TECHNOLOGY 1
1.1.1 Principle of rapid loading device 2
1.1.2 Several rapid loading devices 4
1.1.3 Rock testing methods at intermedium strain rate(lOs-1) 9
1.2 Rock dynamic compressive test device and test technology 18
1.2.1 Evolution and development of SHPB 18
1.2.2 Test principle of SHPB device 19
1.2.3 Simplified analysis on stress uniformity for rock samples 24
1.2.4 Principle and method of data auto-acquisilion and processing system 28
1.3 Rock impact loading test system 31
1.3.1 Horizontal impact testing machine driven by pneumatics 31
1.3.2 Large diameter impact testing machine driven by nitrogen 33
1.3.3 Measuring system for dynamic tests 35
1.3.4 Signal and data processing sotware 37
1.4 Modified configurations of SHPB 39
1.4.1 Triaxial split Hopkinson pressure bar 39
1.4.2 Split Hopkinson tensile bar 43
1.4.3 Split Hopkinson torsion bar 45
1.4.4 Some other modified devices 47
1.5 Dynamic r.ensile test methods for rock-like materials 49
1.5.2 Indirect dynamic tensile test 50
1.6 Ultra-dynamic test instrumentations for rocks 56
1.6.1 Several differern types of test devices 56
1.6.2 Testing principle of gas gun 57
1.6.3 Specimen layout of plaie impact test 60
References 62
CHAPTER 2REASONABLE LOADING WAVEFORMS FOR ROCK IMPACT TEST AND ROCK DYNAMIC TEST METHODS 67
2.1 Stress waveform generated by pistons 67
2.1.2 Computing method of waveform generated by complex pistons 72
2.2 Dispersion of rect.angular waves and rock dynamic sl.ress-strain curves 80
2.2.1 Dispersion of propagation of different waves in rocks 80
2.2.2 Stress-strain curves of rocks obtained by SHPB with rectangular loading 72
2.2.3 Stress-strain-strain rate relationships of rocks under diferent loading waves 89
2.3 Reasonable loading ways for dynamic tests of rock-like materials 91
2.3.2 Half-sine wave loading generated by a special piston 94
2.3.3 Loading conditions for constant stain rate and experimental verification 96
2.4 New method for obtaining constitutive relations of rock at constant strain rate 99
2.4.1 Three-dimensional scatter processing method for vSHPB test data 99
2.4.2 Explanation of three-dimensional scatter processing results 103
2.5 Suggested dynamic test methods for rocks 104
2.5.1 Test system and parameters 105
2.5.2 Dynamic compressive test 105
2.5.3 Dynamic tensile test with Brazilian disc method 107
2.5.4 Dynamic fracture toughness (model) test 108
References 110
CHAPTER 3INVERSE DESIGN FOR REASONABLE LOADING WAVEFORMS AND NUMERICAL SIMULATION OF TEST SYSTEM 113
3.1 Inverse design theory for piston geometry with given waveform 113
3.1.1 Stress waveform by impact of cylindrical piston on long rod 113
3.1.2 Stress waveform by impact of variable cross-section cylindrical piston on long rod 115
3.1.3 Stress waveform by impact of conical piston on long rod 116
3.1.4 Inverse design for piston geometry based on one-dimensional stress wave theory 118
3.2 Piston design corresponding to half-sine wave 119
3.2.1 Inverse design of different size piston generating half-sine wave 120
3.2.2 Dynamic tests of rock by half-sine waves loading 122
3.3 Stress wave characteristics in SHPB system with half-since wave loading 123
3.3.1 Stress uniformity analysis of rod with different contact conditions 123
3.3.2 Dynamic response of SHPB by eccentric impact of a special piston on rod 127
3.4 Calibration of SHPB test wirh special pisl.on generating half-sine
3.4.1 Relationship between piston impact velocity and incident stress 131
3.4.2 Calibration steps for SHPB system with special piston 133
3.5 Numerical simulation of SHPB system with half-sine waveform 134
3.5.1 Numerical model of SHPB system with half-sine waveform 135
3.5.2 Numerical simulation of SHPB by particle flow method 139
3.5.3 Influence of strain rate effect 147
References 152
CHAPTER 4TEST TECHNIQUE UNDER COUPLED STATIC-DYNAMIC LOADS AND THERMAL-MECHANICAL CONDITIONS 155
4.1 Test technique for rocks under coupled static-dynamic loads 155
4.1.1 Test technique under static load and low frequency dynamic disturbance 156
4.1.2 Test system for coupled static-dynamic loads based on SHPB 158
4.2 Rock dynamic test device and r.echnology under coupled thermalmechanical condition 162
4.2.1 Rock dynamic test device under coupled thermal-mechanical condition 163
4.2.2 Experimental setup and procedure 164
4.3 Test system for rock fragmentation under combined static-dynamic loads 165
4.3.1 Test principle of rock fragmentation under combined static-dynamic loads 165
4.3.2 Test equipment of rock fragmentation under combined static-dynamic loads 166
4.4 True triaxial test system for rocks under induced disturbance 170
4.4.1 Test system description 170
4.4.2 Technical parameters of test system 174
References 175
CHAPTER 5 MECHANICAL PROPERTIES OF ROCKS UNDER IMPACT LOADS 176
5.1 Rock dynamic strength 176
5.1.1 Stress-strain relationship of rocks 177
5.1.2 Relationship beiween rock dynamic strength and strain rate 177
5.1.3 Effects of loading waveform and duration time 185
5.1.4 Size effects on rock dynamic 186
5.2 Dynamic fracture criterion of rocks 192
5.2.1 Grady-Kipp model 192
5.2.2 Steverding ehnigk dynamic fracture criterion 197
5.3 Accumulation of rock dynamic damage 200
5.3.1 Fatigue damage of rock by stress wave loading 201
5.3.2 Damage evolution law of rock under repeated impact 203
5.4 Dynamic mechanical properties of rocks at high temperature 208
5.4.1 Thermal effect on density and wave velocity of rocks 208
5.4.2 Thermal effect on dynamic tensile and compressive properties of rocks 209
5.4.3 Thermal efect on dynamic fracture properties of rocks 215
References 217
CHAPTER 6 FAILURE CHARACTERISTICS OF ROCK UNDER COUPLED STATIC-DYNAMIC LOADS 221
6.1 Mechanical properties of rock under static load and low frequency disturbance 221
6.1.1 One-dimensional coupled loads 221
6.1.2 Two-dimensional coupled loads 224
6.1.3 Inluence of frequency and magnitude of dynamic loads 227
6.2 Mechanical properties of rock under coupled static load and impact load 231
6.2.1 Influence of static load with constant impact load 231
6.2.2 Influence of impact load with constant static load 234
6.3 Constitutive models of rock under coupled static-dynamic loads 239
6.3.1 Basicassumptions 239
6.3.2 Rock constitutive models under one-dimensional coupled static-dynamic loads240
6.3.3 Rock constitutive models under three-dimensional coupled static-dynamic loads 241
6.3.4 Verification of constitutive models by tests 245
6.4 Rock dynamic propert.ies under coupled thermal-mechanical effects 250
6.4.1 Influence of temperature wirh certain static pressure 250
6.4.2 Influence of static pressure with certain temperature 253
6.4.3 Dynamic constnutive model of rock under coupled thermal-mechanical effects 255
References 257
CHAPTER 7 DISSIPATION OF STRESS WAVE ENERGY IN ROCKS 258
7.1 Energy distribur.ion in rock dynamic fragmentation 258
7.2 Energy dissipation in rock by different stress waves loading 260
7.2.1 Loading in rectangular wave 261
7.2.2 Loading in exponential wave 264
7.2.3 Loadinginbellwave 265
7.2.4 Useless dissipated elastic wave energy value in rocks 267
7.2.5 Effects of duration time and waveforms 268
7.3 Absorption of energy of stress wave in rocks 269
7.3.1 Analysis of energy absorption in rocks 269
7.3.2 Incident, reflection, transmission and absorption energy in rocks 271
7.3.3 Testing results of absorption energy of stress wave with different duration time in rocks 274
7.4 Energy dissipation in rock loading by stress wave with different loading waveforms 276
7.4.1 Relationship between energy consumption in rock and incident energy 276
7.4.2 Degree of fragmentation at different loading conditions 278
7.4.3 Stress wave form to achieve maximum rock fragmentation 280
7.5 Energy consumption law for rock failure under coupled staticdynamic loads 282
7.5.1 Calculation and test results of energy release in rock under coupled staticdynamicloads 282
7.5.2 Energy absorption law in rock under 3-D loading and unloading process 285
7.5.3 Effect of unloading c,onfining pressure on rock energy absorption 286
References 287
CHAPTER 8 CHARACTERISTICS OF ROCK FRAGMENTATION UNDER COMBINED STATIC AND DYNAMIC LOADS 290
8.1 Theoretical analysis of rock fragmentar.ion under combined loads 290
8.1.1 Rock fragmentation characteristic curves under combined loads 290
8.1.2 Mechanical analysis in rock fragmentation under combined loads 292
8.1.3 Damage and fracrure analysis in rock fragmenration under combined loads 293
8.2 Numerical analysis in rock fragmentation under combined static and
8.2.1 Numerical analysis in rock fragmentation under static load 300
8.2.2 Numerical analysis in rock fragmentation under impact load 301
8.2.3 Numerical analysis in rock fragmentation under combined loads 301
8.3 Experiments of rock fragmentation under combined static and dynamicloads 303
8.3.1 Fragmentaiion experiments under coupled static and impact loads 304
8.3.2 Cutting experiments under coupled static and impact loads 307
8.3.3 Fragmentation experiments under combined water jet and static-impact loads 311
References 313
CHAPTER 9 PROPAGATION OF STRESS WAVES AT DIFFERENT GEOLOGICAL INTERFACES 315
9.1 Reflection and transmission of one-dimensional longitudinal wave in rod 315
9.2 Reflecr.ion and refraction of P-wave and S-wave alfully bonded interfaces 317
9.2.1 Wave reflection on free surface 317
9.2.2 Wave reflection and refraction at interface of two medium 322
9.3 Wave reflection and refraction at slippery interface and dynamic slip criterion of rock mass 325
9.3.1 Wave relection and reraction at slippery interface 325
9.3.2 Energy flow distribution at interface and dynamic slip criterion of rock mass 331
9.3.3 0verall effects of interface near blasting source 334
9.4 Stress wave propagation at closed joints 336
9.4.1 P-wave propagation at joints with linear normal deformation 336
9.4.2 Vertical incident P-wave propagation at joints with non-linear normaldeformation 341
9.4.3 Effect of iniiial stiffness and frequency on reflecrion and transmission factors 342
9.5 Srress wave propagat.ion at open joints 346
9.5.1 Analytical model of slress wave propagation at open joinls 346
9.5.2 Energy transmission of stress waves with different waveforms at open joints 351
9.6 Stress wave propagation in layered rock mass 357
9.6.1 Equivalent wave impedance method 357
9.6.2 Transmitted waveform of stress wave propagated in sandwich structure 360
9.6.3 Energy transfer of stress wave through interlayer 365
9.7 Detonation wave and reasonable matching criterion between rock explosive 366
9.7.1 Traditional viewpoint of reasonable impedance matching 367
9.7.2 Interaction model of explosive detonation in rock mass 368
9.7.3 Reasonable impedance matching criterion between rock and explosive 370
9.7.4 Reasonable impedance matching between conventional explosives and different rock mass 373
References 376
CHAPTER 10 STRESS V~AVE PROPAGMION IN ROCK MASS WITH CAWIY 378
10.1 Strain waves generated by blasting in rock mass 378
10.1.1 Synthesis of wave forms generated by a linear explosive charge 378
10.1.2 Effects of position and orientation on the wave shapes 381
10.2 PPV empirical formula and damage crileria 389
10.2.1 PPV damage criterion in different rock conditions 389
10.2.3 Bench blasting in open-pit mine wirh cavity 393
10.3 Numerical simulation of stress wave propagation in rock mass with cavity 398
10.3.1 Geometric model 398
10.3.2 Input of blastingload 400
10.3.3 Numericalmodel 402
10.4 Srabiliry analysis of cavil.y under bench blasting 405
10.4.1 Stress propagation on ground surface 405
10.4.2 Stability analysis of cavity under bench blasting 407
10.4.3 Calculation of the mimmun safety distance 410
References 412
CHAPTER 11 STRESS WAVE PROPAGATION IN PIEZOELECTRIC ROCK MASS CONTAING QUARTZ 414
11.1 Coupled model between stress wave and electromagnetic wave 414
11.1.1 Coupled mechanical-electrical wave equations 414
11.1.2 Coupled theory beiween stress wave and elecrromagnetic wave 415
11.2 Effect of joint on electromagneiic emission in rock mass 421
11.2.1 Effect of linear joint on electromagnetic emission 421
11.2.2 Effect of non-linear joint on electromagnetic emission 423
11.2.3 Calculation and discussion of joint effecr on electromagnetic emission 424
11.3 Relationship between electromagner.ic emission and rock parameters 428
11.3.2 Relationship between electromagnetic emission frequency and rock parameters 430
11.3.3 Relationship between elecrromagnetic ermssion amplitude and rock mass parameters 431
11.4.1 Frequency and amplitude of electromagnetic emission 434
11.4.2 Surface effects of electromagnetic emission 435
11.4.3 Analysis on abnormal electromagnetic emission for strong shocks or at rock fracture 435
References 437
CHAPTER 12 DYNAMIC CHARACTERISTICS OF HIGHLY STRESSED ROCK MASS AND EFFECTIVE UTILIZATION OF HIGH STRESS 440
12.1 Slabbing failure of highly stressed hard rock 440
12.1.1 Performance of slabbing failure for highly stressed hard rock 440
12.1.2 Slabbing failure of hard rock under uniaxial compression 442
12.1.3 Slabbing failure of hard rock under true triaxial compression with unloading process 450
12.2 Spalling failure of rock mass under impact 456
12.2.1 Performance of spalling failure and occurrence condition 456
12.2.2 Spalling failure of hard rock under one-dimensional impact 458
12.2.3 Damage evolutionary relationship during spalling failure process 460
12.3 Failure characterist.ics of highly sr.ressed pillar under dynamic
12.3.1 Mechanical model of mining pillar under dynamic disturbance 462
12.3.2 3D numerical analysis of mining pillar under dynamic disturbance 465
12.3.3 Strain energy variation in mining pillar under different dynamic disturbance 469
12.4 Zonal disintegration of highly stressed rock mass and kinetic interpretation 470
12.4.1 Review of zonal disintegration in highly stressed rock mass 471
12.4.2 Discontinuous failure of highly stressed rock mass under unloading process 475
12.4.3 Discontinuous failure of highly stressed rock mass under excavation loadingprocess 482
12.5 Induced fracture and non-blasting continuous mining for highly-stressed rock mass 487
12.5.1 Concept and application of non-blasting continuous mining 487
12.5.2 Theory and application of induced racture by unloading in rock mass 488
12.5.3 Feasibility on non-blasting continuous mining by inducing rock fracture 491
References 496
CHAPTER 13 DYNAMIC INTERPRETATION OF ROCKBURST IN HARD ROCK AT GREAT DEPTH AND ENGINEERING PROTECTION 499
13.1 Occurrence conditions and criteria of rockburst 499
13.1.2 Mechanical conditions and criteria of rock burst 501
13.1.3 Dynamic disturbance and induced rock burst in deep mining 505
13.2 Elastic energy release criterion of rock burst 508
13.2.1 Rock energy analysis in one-dimensional coupled static-dynamic loading tes 508
13.2.2 Rock burst occurrence criterion based on both static and dynamic energy index 513
13.2.3 Laboratory simulation of rockbursi in highly siressed rock mass under dynamic disturbance 514
13.3 Rock support technology for burst-prone and highly stressed rock mass 518
13.3.1 Rock support system based on dynamics 518
13.3.2 Power source analysis for rockburst based on self-stabiliry and lime-varying structure 521
13.3.3 Support technology based on coupled static and dynamic loads 527
13.3.4 Support case based on coupLed static and dynamic loads 531
References 533
CHAPTER 14 MICROSEISMIC MONITORING IN MINING ENGINEERING 536
14.1 Theory of microseismic monitoring 536
14.1.1 Hypocentral10cation 536
14.1.2 Main microseismic parameters 537
14.1.3 Focalmechanism 540
14.2 Determination and optimization of monitoring network 542
14.2.1 Detennination of focused area 542
14.2.2 Numerical analysis of three-dimensional srress in mmes 543
14.2.3 Positional distribution and optimization of sensors 546
14.3 Theory of hypocentral location without pre-measured wave velocity 556
14.3.1 Mathematical fitting equations of traditional methods 556
14.3.2 Mathematical firting equations of hypocenrral locar.ion without pre-measured wave velocity 558
14.3.3 Error analysis and case study 560
14.3.4 Blasting experiments in situ and corresponding analysis 565
14.4 Areal hazardous seismic prediction in large-scale mining 567
14.4.1 Characteristics of apparent stress and deformation 567
14.4.2 Conceptual model of seismic nucleation for areal seismology 570
14.4.3 Time series o stress state and deformation 572
References 574
CHAPTER 15 APPLICATION OF STRESS WAVE THEORY IN GEOTECHNICAL ENGINEERING 578
15.1 Rock fragmentation by impact 578
15.1.1 Analysis on force and efficiency of impact drill machine 579
15.1.2 Influence of incident stress waveform on energy transfer efficiency 591
15.1.3 Computer simulation of percussive penetration system 593
15.1.4 Several problems on design of drilling machine 596
15.2 Pile foundation engineering 598
15.2.1 Development process of stress wave theory in pile foundation 598
15.2.2 Application of wave theory in pile foundation engineering 600
15.2.3 Problems of dynamic pile test method 609
15.3 Dynamic compaction 610
15.3.1 Induced wave by dynamic compaction and reinforcing principle 611
15.3.2 Relationship between hammer weight, drop height and reinforcing depth 614
15.3.3 Dynamic reinforcing effects of granular rock material 616
15.4 Nondestructive testing in geotechnical engineering 622
15.4.1 Nondestructive testing for concrete 622
15.4.2 Nondestructive testing for rock bolts 626
15.5 Protection engineering 629
15.5.1 Failure mechanism of underground tunnels by blasting wave 629
15.5.2 Calculation methods for safety protective layer thickness of tunnels 631
15.5.3 Anti-explosion design of underground chambers 633
References 638
INDEX 640
COLOR FIGURES