Study on risk assessment and prevention measures of water outburst from coal seam floor
张雪莲
Zhang Xuelian
 山西省煤炭地质一一四勘查院有限公司
晋东煤炭基地潞安矿区3号煤层带压开采问题突出,进行突水危险性评价是有效防范突水灾害、保障矿井生产安全的基础。以其中部李村煤矿为例,利用五图双系数法和突水系数法对3号煤层底板奥灰水突水危险性进行了评价分区。ZK4钻孔处隔水层厚度小、隔水层的总体抗压强度低、承受的奥灰水压相对较高(5.18 MPa),与突水系数法相比,五图双系数法考虑的主控因素较多,能更准确的分析奥灰突水隐患,因此选择“五图双系数法”的评价结果作为最终依据。五图双系数法评价结果表明,研究区西部ZK4钻孔附近(占全区面积的1.18%)属非直通式危险区,发生突水的可能性较大,其余区域属非直通式相对安全区,发生突水的可能性很小。
The problem of mining under pressure in No.3 coal seam of Lu 'an mining area in Jindong coal base is prominent. The risk assessment of water outburst is the basis for effectively preventing water outburst disaster and ensuring the safety of mine production. Taking Licun Coal Mine as an example, the water outburst risk of Ordovician limestone water in No.3 coal seam floor was assessed and zoned by using five figures and double coefficients method and water outburst coefficient method. The thickness of the aquifuge at ZK4 borehole was small, the overall compressive strength of the aquifuge was low, and the Ordovician limestone water pressure was relatively high (5.18 MPa). Compared with the water outburst coefficient method, the five figures and double coefficients method considered more main control factors and could more accurately analyze the hidden dangers of Ordovician limestone water outburst. Therefore, the assessment results of the ' five figures and double coefficients method ' were selected as the final basis. The assessment results of the five figures and double coefficients method showed that the vicinity of ZK4 borehole in the western part of the study area ( 1.18 % of the total area ) was a non-through dangerous area, and the possibility of water outburst was greater. The rest of the area was a non-through relatively safe area, and the possibility of water outburst was very small.
底板突水五图双系数法突水系数法评价分区
floor water outburst;five figures and double coefficients method;water outburst coefficient method;assessment zoning
主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会