Rock Strata Control Simulation Technology答案2023

第六章测试

1.Generally speaking, in the stage of coal seam mining, the first pressing step of single key stratum is less than that of composite key stratum.（ ）
A:对 B:错
答案:A
2.The equivalent material model test system consists of two parts: a rig for model tests and a test and data acquisition system.（ ）
A:错 B:对 3.Metal strain sensors cannot monitor longitudinal horizon displacement.（ ）
A:对 B:错 4.In the simulation experiment, plastic films can be placed on both sides of the model frame to reduce friction.（ ）
A:对 B:错 5.the composite key stratum is divided into the main key stratum and the inferior key stratum, and the rupture of the inferior key stratum is later than that of the single key stratum.（ ）
A:错 B:对 6.Dyes should not be used to distinguish rock formations.（ ）
A:错 B:对 7.If the simulated stratum thickness is less than ()m, a comprehensive selection should be made:（ ）.
A:0.2 B:0.1 C:0.4 D:0.3 8.The average bulk density of the mixture of sand as aggregate and gypsum and lime as cement is （ ） g/cm³.
A:2.7 B:2.6 C:2.4 D:2.5 9.Select similar materials based on the following principles（ ）.
A:The mechanical index is stable, and the mechanical properties will not change because of changes in atmospheric temperature and humidity B:The main physical and mechanical properties of the model materials are similar to the corresponding parts of the prototype materials C:Convenient for manufacture with short setting time and simple laying D:After changing the ratio, the mechanical index can be greatly changed for selection 10.Model monitoring instruments mainly include（ ）.
A:displacement meter B:model plane C:metal strain sensors D:digital high speed strain gauge