In order to study the interaction between the soil and rock of the coal based paleo- weathered sand- soil rock strata contract surfaces under the influence of the mining interference,a high pressure( 6 ~ 10MPa) shearing test was conducted on the interaction of the sandy soil- weathered rock contact surfaces. A τ- γ curve of the sandy soil- weathered rock contact surfaces under the high stress was obtained from the test. The test showed that the shearing process under the high stress level would have obvious...