崔家沟煤矿软岩巷道支护研究
发布时间：2018-09-09 09:48
【摘要】：崔家沟煤矿矿井开采的深度达已经达到300到400m,矿井周围的地质条件复杂,相关巷道的围岩很松软,矿井压力显现十分剧烈,矿井巷道严重变形。只考虑底鼓,巷道挖掘成功20天左右,底鼓达到高度至300mm。强烈的矿压表像引起巷道的断面面积逐渐缩小,从而对当地的运输、通风以及行人方面等产生重大的影响,成为影响矿井的安全生产的一个最主要因素。为此,随着矿井的开采深度逐渐加深,对矿井巷道的围岩控制、巷道的支撑保护系统的完善以及巷道稳定性的维护等相关研究已经刻不容缓。调研发现,矿井东区2209综放工作面回风顺槽现采用矩形的断面,并用锚网的方式进行支护。借助于巷道变形的沉降监测、实验室岩石力学的参数检测、岩石化学元素分析及数值的模拟等方法,研究了巷道支护的相关形式。同时,得到了锚与棚联合支撑保护的新方案,即以锚网与梯形的微拱可缩性支架相结合的支撑保护。实验研究显示,利用新的联合支护方案对2209综放工作面回风顺槽的支护问题有良好的效果。该课题是关于对复合层状顶板软岩回采巷道支撑保护的问题,阶段性科学研究的成果还可以适用于相似条件下对矿井回采巷道的支护手段的选取问题。
[Abstract]:The mining depth of Cuijiagou coal mine has reached 300 to 400 m.The geological conditions around the mine are complex, the surrounding rock of the relevant roadway is very soft, the mine pressure appears very violent, and the mine roadway is seriously deformed. Considering only the bottom heave, the roadway was excavated successfully for about 20 days, and the bottom heave reached the height of 300 mm. The cross section area of roadway gradually shrinks due to the strong mine pressure table image, which has a great influence on local transportation, ventilation and pedestrian, and becomes the most important factor affecting the safety of mine production. Therefore, with the deepening of mining depth, it is urgent to study the surrounding rock control of mine roadway, the improvement of roadway supporting and protection system and the maintenance of roadway stability. It is found that rectangular section and bolting net are used to support the return air in 2209 fully-mechanized caving face in the east of mine. By means of settlement monitoring of roadway deformation, parameter detection of rock mechanics in laboratory, rock chemical element analysis and numerical simulation, the relevant forms of roadway support are studied. At the same time, a new scheme of combined support protection of anchor and shed is obtained, that is, the support protection is based on the combination of anchor net and trapezoidal micro-arch retractable support. The experimental results show that the new combined support scheme has a good effect on the supporting problem of the return air in 2209 fully mechanized caving face. The subject is about the support protection of soft rock mining roadway with composite layered roof. The results of stage scientific research can also be applied to the selection of supporting means of mining roadway under similar conditions.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD353
本文编号：2232030
[Abstract]:The mining depth of Cuijiagou coal mine has reached 300 to 400 m.The geological conditions around the mine are complex, the surrounding rock of the relevant roadway is very soft, the mine pressure appears very violent, and the mine roadway is seriously deformed. Considering only the bottom heave, the roadway was excavated successfully for about 20 days, and the bottom heave reached the height of 300 mm. The cross section area of roadway gradually shrinks due to the strong mine pressure table image, which has a great influence on local transportation, ventilation and pedestrian, and becomes the most important factor affecting the safety of mine production. Therefore, with the deepening of mining depth, it is urgent to study the surrounding rock control of mine roadway, the improvement of roadway supporting and protection system and the maintenance of roadway stability. It is found that rectangular section and bolting net are used to support the return air in 2209 fully-mechanized caving face in the east of mine. By means of settlement monitoring of roadway deformation, parameter detection of rock mechanics in laboratory, rock chemical element analysis and numerical simulation, the relevant forms of roadway support are studied. At the same time, a new scheme of combined support protection of anchor and shed is obtained, that is, the support protection is based on the combination of anchor net and trapezoidal micro-arch retractable support. The experimental results show that the new combined support scheme has a good effect on the supporting problem of the return air in 2209 fully mechanized caving face. The subject is about the support protection of soft rock mining roadway with composite layered roof. The results of stage scientific research can also be applied to the selection of supporting means of mining roadway under similar conditions.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD353
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