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可用以下方法确定时间因素对采矿方法参数稳定性影响,此法的实质是:用各种不同的荷载(与破坏荷载比较)作用到岩石试块上,同时系统地测量岩石随时间的变形,直到破坏为止。根据测量结果,绘制应变—时间曲线,用以表示岩石变形的的特点(图1)。此图的下部是试块破坏瞬间的应力—时间曲线。这样就可得到表示岩石强度随时间而降低的压力曲线。在确定的时间间隔内,根据压力曲线就能找到与之相对应的材料强度。将找出的强度值代入公式,就可得到考虑时间因素的采矿方法各要素的参数。基申斯克矿在回采过程中,对岩石和充
The following methods can be used to determine the effect of time factors on the stability of mining methods. The essence of this method is to apply various loads (compared to the destructive load) to the rock test block while systematically measuring the deformation of the rock over time until Damage so far. Based on the measurements, strain-time curves are plotted to characterize rock deformation (Figure 1). The lower part of the graph is the stress-time curve of the specimen at the moment of rupture. This gives a pressure curve that shows the rock strength decreases over time. In a certain time interval, according to the pressure curve can find the corresponding material strength. Substituting the intensity value found into the formula gives the parameters of each element of the mining method taking into account the time factor. Kishenskoye in the mining process, the rock and filling