矿井地质条件分类中褶皱构造的定量分析

QUANTITATIVE ANALYSIS OF THE FOLD STRUCTURES IN CLASSIFICATION OF GEOLOGICAL CONDITIONS OF COAL MINES

部颁《矿井地质规程》中,对矿井地质条件分类的各项地质因素,提出了一些定量与定性的标准,其中对褶皱构造定性地划分为四类。作者通过对褶皱构遣的形态分析及数学分析,提出了三个新定量指标,一是褶皱复杂指数K_s,表达式为K_s=sinα+sinβ;二是两翼倾角变异系数γ_q,即产状变化率,表达式为γ_q=S_q/M_q;三是褶皱密度系数N,N=(?)/分类矿井面积。对新建的三个指标通过数学方法计算,找出了合理的分类界限值,之后,构造了类别判定的数学模型,如平面线性模型,空间立面体模型,椭球体模型等,这些模型的综合使用,使每个褶皱都落入分类模型中适当的位置。所有这些研究,经过100多处生产矿井实际资料的验证,都获得了理想结果,确认新建立的定量指标与数学模型及分界值都是科学的、合理的、实用的。

Quantitative and qualitative standards for classification of various factors of the geological conditions were proposed in Mine Geology Regulations issued by the Ministry of Coal Industry,in which fold structures were divided into four categories qualitatively.Based on morphological analysis of fold structure and mathematic analysis,the authors put forward three new quantitative indices.The first index is K_s,index of fold complexity.Its expression is K_s= sinα+ sinβ;The sec- ond index is γ_g,variability coefficient of mean dip angle of two flanks of a fold,that is,occurrence change rate.Its expression is γ_q= S_q/M_q;The third one is N,N=(number of folds+l/4 secondary folds)/area of mine evaluated.After mathematic calculation by using these three indices,boundary values for proper classification were found and mathematic models were constructed,such as plane linear model,space 3D model,ellipsoidal model,etc.Each type of fold has its position in the evaluation model,by combined used of these models.The research has been verified by data obtained from over one hundred coal mines with satisfactory results.These quantitative indices,mathematic models and boundary values have been proved to be scientific,reasonable and practical.