Physical simulation of roof fractured zone roadway instability in ascending de-stressed mining

doi:10.16265/j.cnki.issn1003-3033.2017.06.022

Abstract

Abstract: In order to solve the problem of large deformation of roof fractured zone roadway maintenance in ascending de-stressed mining, overlying strata movement characteristics and fracture failure process were researched by using the method of physical simulation.Meanwhile roadway surrounding rock stress and failure characteristics under the condition of boltsupport were analyzed.The results show that roof fractured zone roadway falls down coordinating with the overlying strata,that at the stage of workface mining, strength of surrounding rock of roof fractured zone roadway drops sharply accompanied by the severe roadway convergency, because of interactions between fracture field and superimposed stress field of mining and roadway extraction,that when the interaction becomes steady after workface mining, surrounding rock stress declines,and that the bolting combined with U-steel or grouting can be implemented to support the roadway.

Key words: ascending mining, de-stressed mining, roof roadway, fractured zone, stability control

CLC Number:

X936
TD7

WANG Cheng, DING Ziwen, CHEN Xiaoxiang. Physical simulation of roof fractured zone roadway instability in ascending de-stressed mining[J]. China Safety Science Journal, 2017, 27(6): 127-132.

References

[1] 李胜, 罗明坤, 范超军, 等.采煤工作面煤与瓦斯突出危险性智能判别技术[J].中国安全科学学报, 2016, 26(10): 76-81.
LI Sheng,LUO Mingkun, FAN Chaojun, et al.Research on coal and gas outburst risk intelligent recognition in mining face [J].China Safe Science Journal, 2016, 26(10): 76-81.
[2] 袁亮, 薛生.煤层瓦斯含量法确定保护层开采消突范围的技术与应用[J]. 煤炭学报, 2014, 39(9): 1 786-1 791.
YUAN Liang, XUE Sheng. Defining outburst-free zones in protective mining with seam gas content-method and application [J].Journal of China Coal Society,2014, 39(9): 1 786-1 791.
[3] 程远平, 俞启香. 煤层群煤与瓦斯安全高效共采体系及应用[J]. 中国矿业大学学报, 2003, 32(5): 471-475.
CHENG Yuanping, YU Qixiang. Application of safe and high-efficient exploitation system of coal and gas in coal seams [J].Journal of China University of Mining & Technology, 2003, 32(5): 471-475.
[4] 马念杰, 郭晓菲, 赵希栋, 等.煤与瓦斯共采钻孔增透半径理论分析与应用[J]. 煤炭学报, 2016, 41(1): 120-127.
MA Nianjie, GUO Xiaofei, ZHAO Xidong, et al. Theoretical analysis of permeability-increasing radius of drilling for simultaneous exploitation of coal and gas and its application[J]. Journal of China Coal Society, 2016, 41(1): 120-127.
[5] 付江伟, 王公忠, 李鹏, 等.顶板水力致裂抽采瓦斯技术研究[J].中国安全科学学报, 2016, 26(1): 109-115.
FU Jiangwei, WANG Gongzhong, LI Peng, et al.Research on technique for gas frainage based on roof hydraulic fracturing [J].China Safety Science Journal, 2016, 26(1): 109-115.
[6] 袁欣鹏, 梁冰, 孙维吉, 等.卸压煤层瓦斯抽采渗透率演化模型研究[J]. 中国安全科学学报, 2016, 26(2): 127-131.
YUAN Xinpeng, LIANG Bing, SUN Weiji, et al. Research on permeability evolution model for coal seam being drained by pressure relief [J].China Safety Science Journal, 2016, 26(2): 127-131.
[7] 钱鸣高, 石平五. 矿山压力与岩层控制[M]. 徐州: 中国矿业大学出版, 2003: 182-185.
QIAN Minggao, SHI Pingwu. Ground pressure and strata control[M]. Xuzhou: China University of Mining and Technology Press, 2003: 182-185.
[8] BOOTH A J,MARSHALL A M,STACE R.Probabilistic analysis of a coal mine roadway including correlation control between model input parameters[J]. Computers and Geotechnics,2016, 74:151-162.
[9] TORANO J, RODRIGUEZDIEZ R, RIVASCID J M,et al. FEM modeling of roadways driven in a fractured rock mass under a longwall influence[J]. Computers and Geotechnics, 2002,29(6): 411-431.
[10] GRASSELLI G.3D behaviour of bolted rock joints: experimental and numerical study[J]. International Journal of Rock Mechanics and Mining Sciences,2005,42(1): 13-24.
[11] 任艳芳, 宁宇, 齐庆新.浅埋深长壁工作面覆岩破断特征相似模拟[J]. 煤炭学报, 2013, 38(1): 61-66.
REN Yanfang, NING Yu, QI Qingxin. Physical analogous simulation of the characteristics of overburden breakage at shallow longwall coalface[J]. Journal of China Coal Society, 2013, 38(1): 61-66.
[12] 李树刚, 王琳华, 林海飞, 等. 采场覆岩“三带”演化特性的相似模拟实验及分析[J]. 矿业安全与环保, 2013, 40(3): 17-20.
LI Shugang, WANG Linhua, LIN Haifei, et al. Similar simulation experiment and analysis of evolution characteristics of “three zones” in overburden strata of stope[J].Mining Safety& Environmental Protection,2013, 40(3): 17-20.
[13] 尹光志, 李星, 韩佩博, 等. 三维采动应力条件下覆岩裂隙演化规律试验研究[J]. 煤炭学报, 2016, 41(2): 406-413.
YIN Guangzhi, LI Xing, HAN Peibo, et al. Experimental study on overburden strata fracture evolution law under threedimensional mine-induced stress conditions[J]. Journal of China Coal Society, 2016, 41(2): 406-413.
[14] 王新丰, 高明中. 不规则采场应力分布特征的面长效应[J]. 煤炭学报, 2014, 39(增1): 43-49.
WANG Xinfeng, GAO Mingzhong.Slope length effect of stress distribution characteristics of irregular stope[J]. Journal of China Coal Society, 2014, 39(S1): 43-49.
[15] 康红普. 深部煤矿应力分布特征及巷道围岩控制技术[J]. 煤炭科学技术, 2013, 41(9): 12-17.
KANG Hongpu.Stress distribution characteristics and strata control technology for roadways in deep coal mines[J]. Coal Science and Technology, 2013, 41(9): 12-17.
[16] 张农, 韩昌良, 阚甲广, 等. 沿空留巷围岩控制理论与实践[J]. 煤炭学报, 2014, 39(8): 1 635-1 641.
ZHANG Nong, HAN Changliang, KAN Jiaguang, et al. Theory and practice of surrounding rock control for pillarless gob-side entry retaining[J]. Journal of China Coal Society, 2014, 39(8): 1 635-1 641.
[17] 勾攀峰, 韦四江, 张盛. 不同水平应力对巷道稳定性的模拟研究[J]. 采矿与安全工程学报, 2010, 27(2): 143-148.
GOU Panfeng, WEI Sijiang,ZHANG Sheng.Numerical simulation of effect of horizontal stresses on stability of roadways[J].Journal of Mining & Safety Engineering, 2010, 27(2): 143-148.
[18] 李鸿昌. 矿山压的相似模拟试验[M]. 徐州: 中国矿业大学出版, 1988: 54-59.
LI Hongchang. Similar simulation experiment of mine pressure[M]. Xuzhou: China University of Mining and Technology Press, 1988: 54-59.
[19] 王成, 张农, 李桂臣. 上行开采顶板不同区域巷道稳定性控制原理[J]. 中国矿业大学学报, 2012, 47(4): 543-550.
WANG Cheng, ZHANG Nong, LI Guichen. Control principles for roadway roof stabilization in different zones during ascending mining[J]. Journal of China University of Mining & Technology,2012, 47(4): 543-550.