【作者】 赵凯；

【导师】 孔祥义；

【作者基本信息】 辽宁工程技术大学 ， 采矿工程， 2014， 硕士

【摘要】 随着浅部资源储量的日益减少,煤矿的开采深度大幅度增加,地质条件越来越复杂,地应力越来越高,高地应力环境中,在浅部表现为硬岩特性的岩层也表现为软岩特性,巷道围岩长期变形不止。在采矿过程中,由于某些原因,巷道不得不布置在松软围岩中,松软围岩具有强度低、结构面发育、膨胀性和流变形严重的特点。针对论文所研究的九道岭煤矿,其-850综放工作面两巷便是布置在1000m深的煤层巷道,煤层平均厚度为10m,由于高应力及其他某些原因,工作面回采过程中,巷道破坏严重,底鼓明显,曾出现大面积冒顶事故,严重影响工作面正常生产。针对本矿的实际问题,本文以经济、高效、安全为原则,通过现场调研了解该矿的地质资料及煤岩物理力学指标,现场地应力测试了解主地应力与巷道的关系,松动圈测试了解巷道围岩类型,从而确定支护理论和支护方式。本文采用组合拱理论确定巷道断面为半圆拱型,支护方式“锚杆+锚索+金属网+钢筋梯+让压托盘”复合支护方式；通过理论计算确定了两巷的支护参数,设计出两套支护方案,并运用FLAC数值模拟软件验证了矿方选择的方案是可行的。对综放工作面两巷支护方案进行了100m工业性试验,同时对试验巷道进行围岩变形、围岩压力和顶板离层观测,根据观测数据来检验支护方案的可行性,最终设计出了适合该矿综放工作面两巷的支护方案,解决了综放工作面两巷支护的难题。更多还原

【Abstract】 With the shallow resources reserves dwindling, mining depth increase greatly in coal mine, geological conditions of increasingly complex, increasingly high stress, high stress environment, in the superficial performance for the hard rock characteristics of strata as well as characteristics of soft rock roadway surrounding rock deformation, long more than. In the mining process, due to some reasons, the roadway has to be arranged in loose and soft surrounding rock, soft rock has low strength, structural surface development, and the flow characteristic of severe swelling deformation.According to the study on Jiudaoling Mine, the -850 fully mechanized top coal caving face two lane is arranged in the deep coal roadway 1000m, the average thickness of coal seam is 10m, because of the high stress and other reasons, during working face mining roadway floor heave obviously, serious damage, and appeared large area roof fall accident, seriously affected the normal production of working face. Aimed at the practical problems of this mine, based on the economic, efficient, safe principle, understanding of the geological data and the coal rock mechanics parameters by field investigation, in-situ stress test to understand the relationship between the main stress and roadway, understanding the type of surrounding rock by loose circle testing, and determine the support theory and support mode.Using the combined arch theory to determine the roadway section is a semicircle arch, supporting "bolt-Cable-metal-steel ladder and let pressure tray" composite support; two road way parameters are determined through theoretical calculation, designing two sets of supporting schemes, and proving the mine selection the scheme is feasible by using FLAC numerical simulation software. The 100m industrial test of fully mechanized top coal caving face two roadway support scheme, the test of roadway surrounding rock pressure and rock roof deformation, according to the observation data to test the feasibility of a protection scheme, the final design for the mine fully mechanized caving face two roadway support scheme, to solve the problem fully mechanized top coal caving face two roadway support更多还原