Surface mine boundary post position layout optimization method based on oblique photogrammetry technology

The invention provides a surface mine boundary pile position layout optimization method based on an oblique photogrammetry technology, and the method comprises the steps: obtaining the topographic parameters of a monitored large-height-difference topographic mine and the camera parameters of an unmanned aerial vehicle aerial photography system, selecting a take-off and landing site of an unmanned aerial vehicle, planning the measurement region range of the unmanned aerial vehicle, and optimizing the position layout of boundary piles of a surface mine. And respectively presetting a relative flight height and a preset overlapping degree, and determining a relative flight height design value and an overlapping degree design value in combination with the terrain parameters, so that the unmanned aerial vehicle completes flight. The special terrain characteristics of the large-height-difference terrain mine are fully considered, and the reasonable relative flight height is designed, so that the ...

一种硫酸钾的生产方法

... 本发明属于盐化工技术领域，尤其涉及一种在盐田中生产硫酸钾的方法。该方法的特征是：(1)工艺流程为钾混盐加水溶解、蒸发结晶软钾混盐、固液分离、加水溶解软钾混盐和氯化钾、蒸发结晶、固液分离得硫酸钾产品，钾混盐加水溶解、蒸发结晶软钾混盐、加水溶解软钾混盐、蒸发结晶四工序均在盐田中实现；(2)工艺条件蒸发结晶软钾混盐工序的母液达到氯化钠晶体析出时进入固液分离，蒸发结晶工序的母液达到钾石盐或软钾镁矾晶体析出时进入固液分离得硫酸钾工序。此方法具有设备投资小，节省能耗，生产成本低，工艺简单易于控制等优点。 ...

Landslide analytical method

The invention relates to a landslide analytical method. The landslide analytical method is accomplished through the first step that the landform is measured, and a section with a tower pole is marked; the second step that scanning is conducted on a satellite map of the section with the tower pole according to pixels, the section marked in the first step is loaded onto a Beisaier curve graph; the third step that new photos scanned after the second step are scanned again, the section district marked in the first step is loaded onto a second Beisaier curve graph generated in the second step, the elevations of the two lines are compared, and if large difference occurs between the elevations, the point can basically be determined to have the possibility of landslide. The landslide analytical method has the advantages that firstly, whether two geologic bodies are of one piece before is judged according to shapes of the images; secondly, combined with topographic data, the landslide point is judged ...

Process for separating Mg and Li from high-Mg Li-contained bittern

A process for separting Mg and Li from high-Mg Li-contained bittern includes adding sodium sulfate to said bittern in the ratio of Mg+Li to sodium sulfate of 1 : (0.05-1.0), vaporizing until the lithium sulfate is saturated in bittern, and further vaporizing until the bischofite is educed out. Its advantages include low content of Mg in product, no waste liquid discharge, high output rate of Li,and reclaiming sodium sulfate.

Preparation method of lithium carbonate by using brine of oil field

Permission control method and system based on improved last check and dual hash function

The invention discloses an authority control method and system based on improved last check and a dual hash function, and the method comprises the steps: creating a role, and forming a role numerical value A through authority numerical values; generating a check code B for the role value A, and generating an independent check code C for the role value A based on a dual hash function; when it is needed to judge whether the user has the corresponding permission, verifying the consistency between the user permission value and the check code B, verifying the consistency between the user permission value and the check code C, and using the role corresponding to the role value A after verification is passed; according to the method, check codes are correspondingly generated based on the improved last check and double hash technology, the check codes are separately stored, consistency verification is carried out through the two check codes, roles are used after verification is passed, the authority ...

Method for quickly estimating mineral resource exploitation quantity of limestone underground mine

The invention relates to a method for quickly estimating mineral resource exploitation quantity of a limestone underground mine, and belongs to the field of mineral resource management. The method specifically comprises the following steps: collecting mining areas of a mine, forming a mining schematic diagram, and planning a scanning route in the mining schematic diagram; according to the scanning route, performing field scanning on the mine by adopting a scanning system to obtain point cloud data; after mine scanning is completed, the point cloud data are sorted, invalid point cloud data are deleted, and a mine point cloud distribution diagram is formed; superposing data of last mine scanning in the point cloud distribution diagram formed by this mine scanning, analyzing the change condition of the goaf, obtaining the range of the goaf formed by the mine within a period of time, and delineating a mine mining area; and calculating the mining quantity within a period of time according to ...

Process for preparing high-quality potassium-containing products by salt-field method

The present invention relates to a technological process for extracting high-quality salt-field potassium-contained product by utilizing salt-field bittern solarization process. Said technological process is characterized by that in daytime, when the temperature is high, the bittern for extracting potassium is introduced into sodium pool to make bitten solarization, evaporation and dehydration, and separate out the salt minerals of sodium chloride, etc., and in night, before the temperature is lowered, the bittern is introduced into potassium pool to lower the temperature and separate out potassium salt, and this operation can be repeated several times,and when the potassium ion content in the bittern is less than 2/1000, the bittern is used as used bittern for other purpose. As compared with existent technological process, KCl content of salt-field potassium-contained product is high, can be up to about 52%, and its production cost is low.

一种硫酸钾的生产方法

The present invention relates to salt chemical technology, and is especially the process of producing potassium sulfate in salt field. The present invention features the technological process including the steps of water adding dissolution of mixed potassium salt, evaporating crystallization of soft mixed potassium salt, solid-liquid separation, water adding dissolution of soft mixed potassium salt and potassium chloride, evaporating crystallization and solid-liquid separation to obtain potassium sulfate product with the most steps being completed in salt field; and the technological conditions, including throwing the mother liquid with separated sodium chloride crystal into solid-liquid separation in the step of evaporating crystallization of soft mixed potassium salt and throwing the mother liquid with separated sylvine or soft leonite crystal in the step of evaporating crystallization. The present invention has the advantages of low cost, low power consumption, simple process, etc.

Open laboratory management system for quality control analysis of salt lake sample

The invention discloses an open laboratory management system for salt lake sample quality control analysis. The open laboratory management system comprises a sample management subsystem, a quality control auditing subsystem, a task allocation subsystem and a salt lake sample processing subsystem, the sample management subsystem is used for storing element content analysis results of the salt lake samples; the salt lake sample comprises a to-be-detected salt lake sample and a standard salt lake sample; the quality control auditing subsystem is used for auditing whether the element content analysis result is qualified or not; the task distribution subsystem is used for distributing the to-be-detected salt lake samples corresponding to the qualified element content analysis results to the salt lake sample treatment subsystem; and the salt lake sample processing subsystem is used for analyzing and processing the received to-be-detected salt lake sample to obtain a salt lake sample salt distribution ...

Process for producing high-quality potassium-containing products by salt-field method