摘要
针对浅埋综采工作面运输巷采用单体支柱超前加强支护工作面推采速度与支护速度不协调、工人劳动强度和安全隐患大、难以实现超前区域少人化等问题,以榆家梁煤矿52305工作面为工程背景,采用现场实测、数值模拟和理论分析相结合的方法,实测了单体超前加强支护条件下的运输巷矿压显现规律,对比分析了单体加强支护和锚杆(索)主动式加强支护两种情况下的巷道围岩安全稳定性,并通过理论分析计算了运输巷支护参数,校验了现场支护的适应性及安全性。研究结果表明:52305工作面运输巷围岩属于较稳定型,现场单体超前加强支护条件下,锚杆(索)承载均在额定载荷的85%以内,两帮应力分布基本对称,围岩移近量和松动圈很小,围岩稳定性较好,现场超前支护段支护强度偏富余。采动支承压力影响段,单体支柱主要对顶板0.6 m范围内的局部岩层具有加强支撑作用,远小于锚杆和锚索支护作用范围和强度。取消单体支护后,运输巷围岩依然能够保持安全稳定。在榆家梁煤矿52305工作面运输巷超前加强支护段进行了取消单体支护工程试验,验证了研究结论的可靠性。
There are many problems of using the single hydraulic prop to strengthen support in transportation roadway of shallow fully-mechanized mining face,such as inconsistency between mining and supporting opera-tions,high labor intensity and hazard risks for workers,and difficulty in reducing the number of workers in ad-vance areas of mining face.Taking the 52305 working face of Yujialiang Coal Mine as the engineering back-ground,and using a combination of field measurement,numerical simulation and theoretical methods,the mining pressure in the transportation roadway with the reinforcement support of the single hydraulic prop in advance area was measured,and the stability of roadway in advance area under the reinforcement support conditions of single hydraulic prop and active reinforcement support with bolts(cables)are compared.Finally,theoretical calculations were conducted on the supporting parameters for the transportation roadway,and the adaptability and safety of on-site support were verified.The results show that the surrounding rock of the transportation roadway of the 52305 working face is categorized to be relatively stable and stable type.The bearing capacity of the anchor bolts(cables)is within 85%of the rated load,and the stress distribution on both sides is basically symmetrical under the reinforcement support condition of the single hydraulic prop.The convergence displacement and loosening zone of the surrounding rock are very small.The stability of the surrounding rock is good.In the section affected by the front abutment pressure,the single hydraulic prop mainly has a strengthening support effect on local rock layers within 0.6 m thick of the roof,which is much smaller than the strengthening zone of anchor and cable sup-port.Cancelling the single hydraulic props,the surrounding rock along the transportation roadway can still main-tain safety and stability.Field trial at the 52305 working face of Yujialiang Coal Mine verified the reliability of the research results.
作者
罗文
黄庆享
范东林
陈苏社
杜君武
王生彪
王庆雄
王巍
郭强
LUO Wen;HUANG Qingxiang;FAN Donglin;CHEN Sushe;DU Junwu;WANG Shengbiao;WANG Qingxiong;WANG Wei;GUO Qiang(China Energy Shendong Coal Group Co.,Ltd.,Shenmu 719315,China;School of Energy Engineering,Xi'an University of Science and Technology,Xi'an 710054,China)
出处
《采矿与岩层控制工程学报》
EI
北大核心
2024年第1期5-17,共13页
Journal of Mining and Strata Control Engineering
基金
国家自然科学基金资助项目(52074211,52204154)
陕西省自然科学基础研究计划资助项目(2019JLP-08)。
关键词
浅埋综采工作面
运输巷
支护参数
主动式超前支护
现场实测
shallow buried fully mechanized mining face
transportation roadway
support parameters
active forepoling
field measurement
