Study on rock pressure behavior law and overburden displacement characteristics of mining face at 1 000 m depth
LIU Qiang1，GAO Mingzhong1，WANG Man2，3，LI Anqiang1，CHEN Hailiang1，LU Tong1，PENG Gaoyou1
(1. State Key Laboratory of Hydraulics and Mountain River Engineering，College of Hydraulic and Hydroelectric Engineering，Sichuan University，Chengdu，Sichuan 610065，China；2. State Key Laboratory of Coking Coal Exploitation and Comprehensive Utilization，China Pingmei Shenma Group，Pingdingshan，Henan 467000，China；3. Institute of Energy and Chemical Industry，China Pingmei Shenma Group，Pingdingshann，Henan 467000，China)
Abstract：In the process of deep coal mining，the rock is affected by high in-situ stress and strong mining disturbance，which is a typical dynamic and static combined loading problem. However，few mature projects can be used for reference in the exploitation of thousand meters mines. A series of geological disasters derived from underground mines directly affect the mining safety. In order to explore the rock pressure behavior law and overburden displacement characteristics of mining face at thousand meters mines，a three-dimensional monitoring system of rock pressure and overburden separation displacement was established，which was based on 24130 mining face of No.10 Mine in Pingdingshan. Under mining conditions，long-term monitoring and data analysis were carried out for borehole stress，bolt stress and roof separation displacement in the process of protective layer mining. The results show that the influence of mining disturbance on deep rock presents remarkable non-linear mechanical characteristics，not single linear increase or decrease. Moreover，the mining disturbance does not have a significant impact on the rock pressure behavior in the whole mining process，but has a significant impact in the ranges of 45–65 m and within 25 m from the mining face. The disturbance effect is remarkable with the increase of mining speed in the above two ranges. Therefore，reducing the mining speed to about 0.5 m/d in the fractured area can ensure the integrity of rock structure and the surrounding rock can have certain bearing capacity. In addition，the influence of mining on roadway roof is more significant than that of roadway sides，and the roadway roof should be strengthened in support design. The main influence area of mining on overburden displacement is in the range of 15–5 m in front of mining face. In this area，roof separation displacement develops faster，and the development speed of roof separation displacement is more significantly affected by the mining speed. It shows that when the mining speed is controlled appropriately in the range from 0.8 to 1.1 m/d，the production requirements can be guaranteed and the roof management in front of the working face can be more conducive，which provides scientific guidance for the safety production of thousand meters mines.
刘 强1，高明忠1，王 满2，3，李安强1，陈海亮1，陆 彤1,彭高友1. 千米深井采动工作面矿压显现规律及覆岩位移特征研究[J]. 岩石力学与工程学报, 2019, 38(S1): 3070-3079.
LIU Qiang1，GAO Mingzhong1，WANG Man2，3，LI Anqiang1，CHEN Hailiang1，LU Tong1，PENG Gaoyou1. Study on rock pressure behavior law and overburden displacement characteristics of mining face at 1 000 m depth. , 2019, 38(S1): 3070-3079.
刘金海，姜福兴，王乃国，等. 深井特厚煤层综放工作面支承压力分布特征的实测研究[J]. 煤炭学报，2011，36(增1)：18–22.(LIU Jinhai，JIANG Fuxing，WANG Naiguo，et al. Survey on abutment
[9]
任艳芳，宁 宇. 浅埋煤层长壁开采超前支承压力变化特征[J].
pressure distribution of fully mechanized caving face in extra- thickcoal seam of deep shaft[J]. Journal of China Coal Society，2011，36(Supp.1)：18–22.(in Chinese))
[2]
张 农，李希勇，郑西贵，等. 深部煤炭资源开采现状与技术挑战 [C]// 全国煤矿千米深井开采技术座谈会. 泰安：[s. n.]，2013：2–23. (ZHANG Nong，LI Xiyong，ZHENG Xigui，et al. The status of deep coal mine and technical challenges[C]// National Technology Conference of Kilometers Deep Coal Mine. Taian：[s. n.]，2013：2–23.(in Chinese))
[4]
周宏伟，谢和平，左建平. 深部高地应力下岩石力学行为研究进展[J]. 力学进展，2005，35(1)：91–99.(ZHOU Hongwei，XIE Heping，ZUO Jianping. Developments in researches on mechanical behaviors of rocks under the condition of high ground pressure in the depths[J]. Advances in Mechanics，2005，35(1)：91–99.(in Chinese))
[5]
谢和平，高 峰，鞠 杨. 深部岩体力学研究与探索[J].岩石力学与工程学报，2015，34(11)：2 161–7 218.(XIE Heping，GAO Feng，JU Yang. Research and development of rock mechanics in deep ground engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(11)：2 161–7 218.(in Chinese))
Haijing，ZHANG Yong，YUAN Zongben. Integral mechanics model of large cutting height mining face and the effect of strata behavior[J]. Ground Pressure and Strata Control，2003，20(Supp.3)：21–27.(in Chinese))
[1]
谢和平，周宏伟，薛东杰，等. 煤炭深部开采与极限开采深度的研究与思考[J]. 煤炭学报，2012，37(4)：535–542.(XIE Heping，ZHOU Hongwei，XUE Dongjie，et al. Research and consideration on deep coal mining and critical mining depth[J]. Journal of China Coal Society，2012，37(4)：535–542.(in Chinese))
[3]
何满潮，谢和平，彭苏萍，等. 深部开采岩体力学研究[J]. 岩石力学与工程学报，2005，24(16)：2 803–2 813.(HE Manchao，XIE Heping，PENG Suping，et al. Study on rock mechanics in deep mining engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(16)：2 803–2 813.(in Chinese))
[7]
潘俊锋，宁 宇，毛德兵，等. 煤矿开采冲击地压启动理论[J]. 岩石力学与工程学报，2012，31(3)：586–596.(PAN Junfeng，NING Yu，MAO Debing，et al. Theory of rockburst start-up during mining[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(3)：586–596.(in Chinese))
[11]
李文璞. 采动影响下煤岩力学特性及瓦斯运移规律研究[博士学位论文][D]. 重庆：重庆大学，2014.(LI Wenpu. Research on mechanical characteristics and gas migration law of coal influenced by mining[Ph. D. Thesis][D]. Chongqing：Chongqing University，2014.(in Chinese))
[14]
王金山，王忠昶. 采动覆岩破坏及离层发育特征的三维数值模拟[J]. 煤矿开采，2011，16(6)：22–26.(WANG Jinshan，WANG Zhongchang. 3D numerical simulation of overlying strata broken and separation induced by mining[J]. Coal mining Technology，2011，16(6)：22–26.(in Chinese))
[16]
平顶山天安煤业股份有限公司. 十矿24130采煤工作面作业规程[Z]. 中国，2014.(Pingdingshan Tianan Coal Industry Co.，Ltd. Operating regulation of 24130 mining face in No.10 Mine[Z]. China，2014.(in Chinese))
[6]
窦林名，何 江，曹安业，等. 煤矿冲击矿压动静载叠加原理及其防治[J]. 煤炭学报，2015，40(7)：1 469–1 476.(DOU Linming，HE Jiang，CAO Anye，et al. Rock burst prevention methods based on theory of dynamic and static combined load induced in coal mine[J]. Journal of China Coal Society，2015，40(7)：1 469–1 476.(in Chinese))
[8]
姜福兴，姚顺利，魏全德，等. 重复采动引发矿震的机制探讨及灾害控制[J]. 采矿与安全工程学报，2015，32(3)：349–355.(JIANG Fuxing，YAO Shunli，WEI Quande，et al. Tremor mechanism and disaster control during repeated mining[J]. Journal of Mining and Safety Engineering，2015，32(3)：349–355.(in Chinese))
煤炭学报，2014，39(增1)：38–42.(REN Yanfang，NING Yu. Changing feature of advancing abutment pressure in shallow long wall working face[J]. Journal of China Coal Society，2014，39(Supp.1)：38–42.(in Chinese))
[13]
李文增，李 岐，马 群. 采动影响下覆岩破坏动态发展过程的数值模拟[J]. 金属矿山，2012，(9)：37–40.(LI Wenzeng，LI Qi，MA Qun. Numerical simulation of overburden rock strata fracture dynamic progressive process induce by caving[J]. Metal Mine，2012，(9)：37–40.(in Chinese))
[15]
徐晓炼. 平煤不同赋存深度采动煤岩体稳定性研究[硕士学位论文][D]. 成都：四川大学，2016. (XU Xiaolian. Study on stability of mining coal and rock mass with different occurrence depth[M. S. Thesis][D]. Chengdu：Sichuan University，2016.(in Chinese))
[17]
张文军，张宏伟，于世功. 锚杆支护巷道顶板离层监测方法探讨[J] 辽宁工程技术大学学报，2002，21(4)：421–424.(ZHANG Wenjun，ZHANG Hongwei，YU Shigong. Study on the monitor method of roof separation in bolter support roadway[J]. Journal of Liaoning Technical University，2002，21(4)：421–424.(in Chinese))
2019, Vol. 38 
