黏土隔水层的应力应变全程相似模拟材料和配比实验研究

Experimental study of simulation material and matching for whole stress and strain process of clay aquiclude

通过对榆树湾煤矿黏土和黄土隔水层岩样的力学实验,获得原型的相似应力应变全程曲线。根据以往的研究经验,确定河沙、黏土、菜籽油和水为相似配比材料,采用变单因素分析法,将沙、土、油和水进行配比实验,比对相似材料的应力应变全程曲线,考虑材料破坏的峰值强度和应变及残余强度和应变等主要因素,得出普通润滑油是理想的塑性影响剂,并获得了最佳黏土隔水层相似配比。研究实现了对黏土隔水层应力-应变全程相似,为隔水层稳定性和保水开采的相似模拟研究提供了有效方法。

By testing the clay and loess of aquiclude of Yushuwan coal mine,the original stress-strain is obtained. Based on the past researches, the simulation materials are determined to use sands, clay, oil, and water. According to the single-factor analysis method, material matching tests are carried out. The proper simulation materials and its proportion are obtained by comparing factors of peak-strength and strain as well as the residual strength and strain in the whole stress-strain curves of aquiclude simulation materials. It is found that the general lubricating oil is the good influence agent for material plasticity and the proper material matching of clay aquiclude simulation material is obtained. This research rea-lizes the whole stress-strain using materials for simulating clay aquiclude. It provides an effective way for studying the aquifer stability and water conservation in mining.