摘要
通过对无煤柱沿空留巷采场覆岩运动和岩层破断规律进行分析研究,得到随着采场工作面的推进,老顶岩梁裂断形成的砌体岩块相互铰接形成“类拱”结构,并提出了无煤柱开采围岩控制对象主要为在“类拱”结构内对采场侧向支承压力有明显影响的岩梁,对其采用“给定变形”的控制思路;建立了由采场沿空巷道实体煤帮、巷旁充填体和采空区矸石共同承载无煤柱沿空巷道围岩结构力学模型。以赵官煤矿1706东工作面为工程研究对象,进行了巷旁充填体工作阻力和协调变形理论计算,根据计算结果,采用正交试验法对巷旁充填材料进行配比研究,并进行了充填体力学特性实验分析,得到适应无煤柱采场沿空巷道变形、具有良好承载性能的新型巷旁充填体。现场实测结果表明,新型巷旁充填体能够达到无煤柱开采围岩控制的预期效果,为煤矿安全绿色开采提供了新途径。
Through the analysis and research on the overburden movement and rock strata breaking rule of gob-side entry with non-pillar mining,it was known that with the advance of the stope working face,the masonry blocks formed by the fracture of the old roof beams were hinged together to form an“arch like”structure.At the same time,it was pointed out that the control object of the surrounding rock with non-pillar mining was the rock beam which had obvious influence on the lateral support pressure of the stope in“arch like”structure,the control idea of“given deformation”was adopted to control the above rock beam;the mechanical model of the surrounding rock structure of gob-side entry with non-pillar mining was established,which was jointly supported by the solid coal seam of the gob-side entry,the fillings beside roadway and the gangue of the gob.Taking 1706 east working face of Zhaoguan Coal Mine as the engineering research object,the theoretical calculation of working resistance and coordinated deformation of the fillings beside roadway was carried out.According to the above calculation results,orthogonal test method was adopted to study the proportion of filling materials and the mechanical characteristics of fillings was analyzed,which obtained a new type of fillings beside roadway suitable for deformation of gob-side entry with non-pillar mining and having good bearing performance.The field measurement results show that the new type of fillings beside roadway can achieve the expected effect of surrounding rock control in non-pillar mining,which provides a new way for safe and green mining of coal mine.
作者
高明涛
辛恒奇
郭忠平
莫技
庞继禄
刘崇凌
GAO Mingtao;XIN Hengqi;GUO Zhongping;MO Ji;PANG Jilu;LIU Chongling(College of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Xinwen Mining Group Co.,Ltd.,Tai’an 271200,China;National Engineering Lab of Backfill Mining in Coal Mine,Tai’an 271200,China;Sichuan Academy of Safety Science and Technology,Chengdu 610045,China)
出处
《矿业安全与环保》
北大核心
2019年第5期25-31,共7页
Mining Safety & Environmental Protection
基金
国家重点研发计划项目(2018YFC0604700)
国家自然科学基金面上项目(51474134)
矿山灾害预防控制国家重点实验室开放基金项目(MDPC2013KF19)
关键词
无煤柱开采
沿空留巷
类拱结构
力学特性
充填体
non-pillar mining
gob-side entry
arch-like structure
mechanical property
filling
