prospecting stage

The Status of CBM Work in Coal Resources Prospecting Stage and the Countermeasures

河北省煤炭资源勘查阶段的煤层气工作现状与对策

The forecasting study on coal gas emergence and burst in deep , long and Wide Tunnel at Prospecting Stage

勘察阶段深埋长大隧中道煤层瓦斯涌出与突出的预测研究

Firstly , based on the preliminary evaluation for environment of dangerous source at the prospecting stage , the risk factors effect and construction of risk reduction can be determinated .

首先，据勘察资料对隧道突涌水的孕险环境进行初步评价，以确定隧道不同区段降低致险因子影响度的施工对策；

To raise geologic and economic effect by every possible ways , the main ways should be followed : strengthen the study of feasibility in prospecting stage and before constructing mine ;

要以加强勘探阶段和进行矿山建设之前的可行性研究；

It was considered that the application of high density resistivity measurement is efficient and economic to seach for new ores during the orebody prospecting stage in the ore field .

认为在该矿区矿体勘探阶段应用高密度电阻率测量方法探寻矿体，具有效率高，成本低的特点。

However , it is feasible to forecast coal gas emergence and burst at prospecting stage through applying the fundamental theory and determine methods of coal gas combining with the geological characteristic of the tunnel engineering .

但是，运用瓦斯地质的基础理论和测试方法，结合隧道工程地质特点，在勘察阶段预测煤层瓦斯的涌出与突出，是可行的。

Through the investigation and analysis of geological factors and using the determine methods which suit for the prospecting stage , the authors built the comprehensive judgment criterion of coal gas burst , set an way of coal gas geological work at prospecting stage initially .

作者在勘察阶段着重进行地质因素调查、分析，并采用地勘阶段适用的测试方法，建立了瓦斯突出的综合判据，初步建立了勘察阶段瓦斯地质工作的思路与方法。

Choice of assessment methods about prospecting rights during prospecting stage

勘查阶段探矿权评估方法选择

Foreign investors are allowed to incorporate expenditures on prospecting into deferred assets and have them amortized at the prospecting stage .

允许外商将勘查费用计入递延资产，在开采阶段分期摊销。