摘要
基于模糊数学理论,通过统计经验数据,采用熵值法对影响近松散含水层安全开采的关键因素赋权,利用GIS定量确定各个因素的隶属度,构造了基于熵值的模糊综合评判模型。以山东某矿六采区01工作面开采为例,选择覆岩厚度、断层构造、第四系底部粘土层厚度、底部含水层的单位涌水量、煤层开采厚度、导水裂隙带高度6个影响因素为评判指标,确定了可行性程度的评判集:{较低,低,中等,高,很高},依据水体下开采的有关安全规程,采用GIS方法确定了各个因素的隶属度,并利用历史开采经验数据确定各个影响因素的权重。对该工作面近松散含水层下开采的评判结果表明,该工作面控制采高为2 m时开采是安全可行的,开采过程中针对薄弱环节采取了相应措施,没有发生突水溃砂事件,初步验证了该模糊综合评判模型的实用性。
Based on fuzzy mathematic theory and related statistical data,the entropy weight method was used to evaluate the weights of the key factors affecting the mining safety under unconsolidated aquifers.Moreover,GIS was applied to determine each factor’s membership degree,therefore a fuzzy comprehensive evaluation model was established based on entropy weight.In the panel No.01 of a coal mine in Shandong Province,six factors were chosen as evaluation indexes,including the thickness of overburden rock,fault structure,the thickness of the lowest Quaternary clay,the specific inflow of the bottom sand aquifers,the thickness of mining and the height of water flowing fractured zone.The evaluation set of the degree of feasibility was determined {lower,low,medium,high,very high}.According to the related codes for mining safety under water bodies,each factor’s membership was determined by GIS and each factor’s weight was deducted from mining data.A comprehensive evaluation for the mining safety under the unconsolidated aquifers shows that it is feasible when the extraction height is 2.00 m for the panel.No.01 by taking appropriate measures targeting on some unsafe factors.No serious disturbances and accidents such as groundwater inrush and quicksand have happened during mining and the applicability of the fuzzy evaluation method has been verified preliminarily.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2012年第4期43-46,51,共5页
Coal Geology & Exploration
基金
国家自然科学基金项目(40772192
41072237)
高等学校博士学科点专项科研基金项目(20100095110015)
国家自然科学基金委员会与神华集团有限公司项目(51174286)
关键词
水体下采煤
松散含水层
导水裂隙带
熵值法
模糊综合评判
coal mining under water body
unconsolidated aquifers
water flowing fractured zone
entropy weight
fuzzy compoprehensive evaluation
