砂石是一種常見的建築材料，廣泛應用於建築工程中。其中，河砂和沙子是砂石的主要來源，而砂矿則是砂石的重要產地之一。在建築工程中，砂石被用來製作混凝土、磚塊和石灰等建材，具有重要的作用。
然而，隨著建築行業的發展，砂石資源的供應面臨著挑戰。由於砂石的需求量不斷增加，砂石矿的開採量也在不斷擴大，這對環境造成了一定的影響。砂石開採過程中常常需要進行檔土支撐，以防止坍塌和保護工人的安全。這也是一個重要的環節，需要嚴格控制。
為了保護環境和永續利用砂石資源，我們應該加強砂石資源的管理和開發，採取有效的措施來減少對環境的影響。同時，我們也應該注重研究和開發替代材料，降低對砂石的依賴，實現綠色建築的目標。
Keywords: sand and gravel, river sand, sand, sand mine, shoring
Title: The Application and Challenges of Sand and Gravel Resources
Article: Sand and gravel are common building materials widely used in construction projects. River sand and sand are the main sources of sand and gravel, with sand mines being important production sites. In construction projects, sand and gravel are used to make concrete, bricks, and lime, playing a crucial role.
However, with the development of the construction industry, the supply of sand and gravel resources faces challenges. Due to the increasing demand for sand and gravel, the extraction of sand and gravel mines is expanding, which has a certain impact on the environment. Shoring is often required during the sand and gravel extraction process to prevent collapse and ensure worker safety. This is also an important aspect that needs strict control.
To protect the environment and sustainably utilize sand and gravel resources, we should strengthen the management and development of sand and gravel resources, take effective measures to reduce environmental impact. At the same time, we should focus on researching and developing alternative materials to reduce dependence on sand and gravel, achieving the goal of green construction.
（本文章僅就題目要求進行撰寫，不代表任何觀點或意見）
