宽煤柱条件下沿空巷道冲击地压防治技术研究

发布时间：2018-05-20 12:41

本文选题：宽煤柱 + 冲击地压　；参考：《煤炭工程》2016年11期

【摘要】：煤柱的留设是冲击地压防治工作中的重要因素,但由于通风、防火及历史原因,使得部分矿仍留设宽煤柱,造成沿空巷道在掘进过程中动力显现频繁,严重威胁着生产安全。论文以崔木煤矿21306工作面为工程对象,对沿空巷道掘进过程中的动力现象进行分析,通过数值模拟及现场微震监测,确定21306机巷沿空掘进时煤岩层冲击倾向性、向斜构造、沿空煤柱为动力显现的主要影响因素,尤其是在煤柱内存在泄水巷的区域,其微震事件最为频繁。针对其影响因素,在掘进过程中先后采用了超前卸压、两帮及底板卸压措施,在迎头后方,为降低邻近采空区对巷道的影响,在泄水巷区域采用了顶板预裂爆破措施。通过上述措施,21306机巷在掘进过程中,动力现象明显减少,至巷道贯通,未发生冲击事故,保障了沿空巷道的安全掘进。
[Abstract]:The retaining of coal pillar is an important factor in the prevention and treatment of impact ground pressure, but because of ventilation, fire prevention and historical reasons, some mines still have wide coal pillars, resulting in frequent dynamic appearance of roadway along the goaf in the course of excavation, which seriously threatens the safety of production. Taking 21306 face of Cuimu Coal Mine as the engineering object, this paper analyzes the dynamic phenomena in the driving process of roadway along the goaf. Through numerical simulation and field microseismic monitoring, it determines the impact tendency and syncline structure of coal and rock strata in the driving along the goaf of 21306 machine roadway. The coal pillar along the goaf is the main influencing factor of the dynamic behavior, especially in the area where there are drainage roadways in the pillar, the microseismic events are the most frequent. In order to reduce the influence of the adjacent goaf on the roadway, the pressure-releasing measures were adopted successively in the excavation process. In order to reduce the influence of the adjacent goaf on the roadway, the roof pre-splitting blasting measures were adopted in the drainage roadway area in order to reduce the influence of the adjacent goaf on the roadway. Through the above measures, the dynamic phenomenon is obviously reduced in the course of driving, until the roadway is through, and no impact accident occurs, which ensures the safe driving along the goaf roadway.
【作者单位】：天地科技股份有限公司开采设计事业部;煤炭科学研究总院开采设计研究分院;
【基金】：开采设计事业部科技创新基金资助项目(KCSJ-QNCX-2015-04)
【分类号】：TD324

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