松软煤体巴西劈裂试验研究及应用
Experimental Study on Soft Coal Brazilian Split and Application
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摘要: 为了获得厚径比和含水率对松软煤体劈裂强度的影响规律，以淮南矿业集团新庄孜煤矿66207工作面松软煤体为研究对象，进行不同厚径比和不同含水率条件下型煤的巴西劈裂试验，并将实验结果代入考虑垫条与试样接触角的抗拉公式计算。试验结果表明：含水率相近时，随着试样厚径比的增大，抗拉强度逐渐减小，厚径比-抗拉强度曲线下降趋势不断减缓，厚径比大于0.6后曲线近似水平；厚径比相同时，随着含水率增加，煤样抗拉强度总体呈下降趋势。Abstract: Soft coal of 66207 working face in Xinzhuangzi Coal Mine in Huainan Mining Area was taken as the research object in order to obtain the effect of different ratios of thickness to radial dimension and moisture content on soft coal splitting strength. Brazilian splitting test of coal with different ratios of thickness to radial dimension and moisture content were carried out, and the results were taken into the tensile formula considering filler strip and sample contact angle. The results showed that when moisture content is similar, with the increase of ratio of thickness to radial dimension of sample, tensile strength decreases gradully, the downward trend of ratio of thickness to radial demension and tensile strength curves slow down, and the curve is approximately level after the ratio of thickness to radial dimension is greater than 0.6; when the ratio of thickness to radial dimension is the same, with the increase of moisture content, tensile strength of coal sample is on the decline as a whole.
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