选择性破碎 meaning in Chinese

selective crushing

With a great deal of experimental data , the feasibility of separating waste from the coal directly under the earth , had been defined . a model of machine of crashing and separating was put forward . which would offer some basic data for the future
通过大量的实验数据，确定了煤、研井下选择性破碎分选的可行性，提出了破碎分选机的模型，为以后的工作提供一定的基础数据。
The purpose of this subject was solving the problem of separation on working face . it can provide feasible source for separating coal and waste and some data for the choice of machine by researching the characteristics of waste rock and charcoal , i found a way to separate irregular waste rock from charcoal . by researching the strength of the irregular rock , got a strength equation for it and decided the feasibility by contrasting the regular assaying with the irregular assaying . in addition , using the theory of statistics , i can decide the suitable number of stylebook to ensure the feasibility of the experiment
本课题主要是为了解决综采工作面煤、矸分离问题，为煤、矸破碎分选提供可行性方法，为破碎分选机提供数据资料。通过对煤、矸各种特性的研究，找出一种能解决不规则煤、矸选择性破碎分选的技术途径。对不规则自然矿块强度特性研究，找出一种计算不规则自然矿块强度公式，通过规则试件与不规则试件的比较确定出其可靠性。