Henan Tengchao Machinery Technical Specifications for Open-Pit Mining

       1.Geological exploration work should be undertaken by qualified geological exploration units. Large and medium-sized mines should submit detailed exploration reports, while small mines can submit survey reports.

       2.Detailed geological surveys should determine the location for trial mining and conduct the trial mining.--The total volume of the rough blocks produced from the trial mining sites is not less than50m3。

       3.The mining area should be meticulously surveyed for the occurrence and density of joints and fissures, as well as the inherent defects of the stone itself.(Natural defects such as freckles and streaks)Statistics should be conducted to clarify the development characteristics of the flow lines and surface structures of the granite deposit. The trial mining waste rate should be calculated and tallied according to the three-dimensional directional dimensions.

      4.Statistical and calculation of the rough material yield for marble and granite should conform to the specifications of small rough material sizes.JC/T 202No Chinese content provided.JC/T 204Requirements for the size of small waste materials vary for other decorative stones and stone deposits for special uses. Specific criteria can be agreed upon by the production, geological, and design parties.

      5.Stone quarries with different construction scales should be planned and designed by qualified design and consulting institutions in accordance with the construction procedures, ensuring comprehensive planning for the quarries.

     6.The mine should have the following tasks completed by a design or consulting firm with the appropriate qualifications during the planning and design phase.:Mining Development and Utilization Research, submit mining development and utilization plans. Conduct research and environmental impact assessment on the current status of land resources and the surrounding environment of mining areas, and submit environmental impact assessment documents with different depths and contents at different design stages. Assess the risk of geological disasters and submit soil and water conservation and restoration plans.

7.Mining safety technology should comply withGB16423Regulations state that mine safety assessments must be conducted by safety evaluation institutions with the appropriate qualifications. Mine safety technology and facilities must be designed, constructed, and put into production and use concurrently with mine construction and production.

       8.Unit mineral deposits should be by single-A mining company is engaged in extraction. When a unit mineral deposit is exploited by multiple companies, each should establish an independent extraction and transportation system. The mining boundaries must not intersect or overlap with one another.

       9.No mining companies shall operate simultaneously on the same slope in a vertical direction, dividing it into two or more sections.

      10.Based on the geological conditions of different mines, determine the economic stripping ratio, and then delineate and adjust the final open-pit mining boundary according to the economic stripping ratio. Generally, the stripping ratio of mines does not exceed...0.5: 1Rare varieties can be determined on a case-by-case basis.

      11.Open-pit mines' final mining level should generally not be lower than the local erosion datum surface. For mines that require extension or depression mining, the geological exploration units must provide necessary ore deposit geological and hydrogeological data for the mining design and conduct a technical and economic evaluation.

      12.The slope angle for mining should meet safety production requirements, which is determined by the design based on the stability of the slope rock and engineering geological conditions..

      13.Final undercarriage width should not be less than20m。

      14.The mining development plan should be comprehensively determined by the design unit based on the topography of the mining area and the geological characteristics of the ore deposit, as well as economic and technical conditions.

     15.When mining operations utilize road transportation to expand, their road construction is in compliance withGB] 22-87Required for the design of a three-level mine road.

     16.The roadbed width of the mining road is no less than5.5m,Pavement width is not less than3.5m;The roadbed width at the wrong-way driving section is no less than1Im. Road width is no less than7m.

     17.Mining Road Curve Radius Not Less Than15m。

     18.No Chinese content provided for translation.9%Downhill driving with heavy loads permitted1%。

     19.When the grade of the mining road is8%~9%At the time, the length of the grade shall not exceed200m.The length of the deceleration slope is not less than50om. 

     20.When utilizing road transportation for expansion, the step height shall not exceed20m;When using cranes or joint development, the step height should comply with the table according to the type and specifications of the lifting equipment.3Requirements.