COMPARATIVE EXPERIMENTAL RESEARCH ON POINT LOAD STRENGTH，UNIAXIAL COMPRESSIVE STRENGTH AND TENSILE STRENGTH FOR ROCKS IN ROOF AND FLOOR OF COAL SEAM
FU Zhiliang1，2，WANG Liang1，2
(1. School of Energy and Safety，Anhui University of Science and Technology，Huainan，Anhui 232001，China；
2. Key Laboratory of Coal Mine Safety and High-efficiency Mining Cosponsored by Anhui Province and Ministry
of Education，Anhui University of Science and Technology，Huainan，Anhui 232001，China)
Abstract：The comparative experimental research on point load strength，uniaxial compressive strength and tensile strength of rocks in the roof and floor of coal seam was carried out by the self-made point load tester to obtain a quick and accurate method to predict uniaxial compressive strength and tensile strength through point load strength. The results show that the samples of coarse stone with lower point load strength are greatly influenced by loading rate and loading direction；so the errors of the predictive values and actual values are quite large. For the rock samples with larger point load strength，their linear correlations are higher among strengths of three types. It provides an important basis for the determination of rock strength and rock mass classification in the roof-floor of coal seam.
付志亮1，2，王 亮1，2. 煤层顶底板岩石点荷载强度与拉压强度对比试验研究[J]. 岩石力学与工程学报, 2013, 32(1): 88-96.
FU Zhiliang1，2，WANG Liang1，2. COMPARATIVE EXPERIMENTAL RESEARCH ON POINT LOAD STRENGTH，UNIAXIAL COMPRESSIVE STRENGTH AND TENSILE STRENGTH FOR ROCKS IN ROOF AND FLOOR OF COAL SEAM. , 2013, 32(1): 88-96.
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2013, Vol. 32 
